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\ v <br /> WEISS ASSOCIATES •) <br /> The cuttings collected from the soil borings will be stockpiled in appropriate <br /> containers. Analytic results for the soil samples collected from the borings will be used to <br /> determine the appropriate disposal methods for these soils. If the analytic results indicate <br /> that the cuttings are hazardous material, additional samples will be collected to <br /> characterize the soil for Class I disposal. <br /> After each soil boring is complete, the area will be cleaned. <br /> 3.4 CHEMICAL ANALYSES <br /> Samples will be analyzed at a California Department of Health Services (DHS) <br /> approved analytical laboratory using EPA-approved analytic techniques. The following <br /> analytic schedule has been approved by Tom Lee of the DHS hazardous materials <br /> laboratory in Berkeley, California. <br /> Samples collected from beneath vaults 1, 5 and 6 will be analyzed for ethylene <br /> glycol by gas chromatography/flame ionization detection using a "DB Wax" megabore-type <br /> chromatographic column. Since there are no existing Environmental Protection Agency <br /> (EPA) protocols for this analytic technique, the analytic laboratory will provide the <br /> following verification information with the analytic results: <br /> 1) Descriptions of the sample preparation and extraction procedures; <br /> 2) Spike and duplicate recovery data; <br /> 3) Detection limits; and <br /> 4) Analysis sensitivities. <br /> The samples from beneath Tanks 7 and 8 will be analyzed, using the Waste <br /> Extraction Test (WET) technique, for soluble chromium (Cr) and copper (Cu) by atomic <br /> absorption (AA) with detection limits of 0.01 to 0.02 ppm. These samples will also be <br /> analyzed for total sodium (NA) by AA with a detection limit of 2 ppm. and by <br /> colorimetric determination for total sulfate with a detection limit of 10 ppm. Since <br /> WP1F:\ALL\331DWG\331R1APg.DOC:74-331-OO:V1.035 Page 16 <br />